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Reduce the pressure on the drill bit to cut through the reinforced iron
without any problems. You increase the pressure again when you have cut
through the reinforced iron.
Drill bit extension
If you have to drill deeper than the usable length of your drill bit is:
First, only drill to the point the usable length of the bit reaches.
Remove the bit and pull the centre core out of the hole without
moving the core drilling unit.
Push the drill bit back into the bore hole.
Screw an adequate extension between drill bit and motor. Please do not
forget the copper rings which make the removal of the drill bit easier.
Overload Protection
In order to protect the operator, motor and drill bit, the ESD 200 is equipped
with a mechanical and electronic overload protection.
Mechanical:
In the event of a sudden jamming of the drill bit, the
machine's kickback is limited to a reaction torque
controllable by the operator and the drill rig by means of a
slip clutch.
Electronic:
In case of overload due to large a feed force, the electronic
facility in the tool switch will deenergize the tool. After
discharge and reengagement one can drill again.
Safety Clutch
The safety clutch should absorb shock and excessive stress. It is an aid
and not an absolute protection. Therefore you have to handle and drill
carefully. To keep it in good condition, the clutch should slip for a
very short time (max. 2 seconds) in each case only. Slipping for
longer periods destroys the safety clutch. After excessive wearing the
clutch has to be renewed by an authorized service shop.
Fracture of Segments
If a diamond segment, parts of the reinforcement or something similar
breaks out, and consequently the drill bit seizes, stop working on this bore
and drill a hole with the same centre and a diameter being 15 – 20 mm
bigger.
Do not try to finish your work using another drill bit of the same
diameter!
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